First of all... All the above calculation is base on what you think. You did not sell the tissue yourself or do any market research... Do you think for a day of 8 hours, they only sell to 16 peoples per day???
They do not buy the tissues from NTUC, they have other source which is cheaper... It also depend whether you are handicap, If you are, you will have more customers.
When I was about 16 years of age, I always brought tissue from a blind uncle at AMK centre hawker, he is always accompany by an auntie to lead him the way. I brought out of pity him. However 1 fine day, I saw this auntie beating up this blind guy for unknown reason and both of them board a taxi after that...
What I am trying to say it that please do not be surprise that they can sell to above 100 customers per day and make a decent profit.
Remember the blind guy which always play music on the MRT or bus interchange?? He donated SGD 15K every year from his earning...
Wow! So lucrative. Why don't you get your Mother to sell tissue papers while exhibiting her Phua Chee Bye. I m sure she will make good sales figures. Lots of sympathetic people out there. Otherwise she can always offer extra services to potential buyers. :oIo::kma: